2" Tall Super Sucker Spacers For 4150 Series Carb. Super sucker carburetor spacers are the most effective carburetor spacers ever developed. Adds up to 47 HP naturally aspirated, and 500 HP with nitrous oxide Super Sucker carb spacer also properly distribute the air/fuel mixture to the manifold. Improvements in the throttle response, driveability, top end horsepower and torque are commonplace when using a Super Sucker.